Danfoss Optyma OP-UPAC015COP04E Application Manuallines page 26

Application Guidelines
Piping work at site
1. Pipe diameter
Prepare refrigerant pipes at site. Pipe joints are as shown below.
Pipe dia.
Pipe dia.
Fig. 16
2. Suction pipe
• Normally, adjust the pipe size to the end diameter of copper pipe at the joint of condensing
unit.
• Provide a downward slope (1/200 to 1/250) at the sidewise run of suction pipe. To return
lubrication oil smoothly, do not provide a trap at the sidewise run section. Where heights
differ larger than 5 m between the condensing unit and the low pressure device, provide
a small trap.
3. Liquid piping
• Install the liquid solenoid valve just before the expansion valve.
• If the liquid feed piping is overheated by the effect of other heat source, it generates flash gas, reducing the cooling capacity. Run the
liquid feed piping at a place as cool as possible. Where it passes at a place at high temperature by any chance, insulate it.
4. Pipe bending
When bending a pipe, it is necessary to compensate for possible thinning of pipe wall by bending, where the bending radius R is 4 times
of pipe O.D., or less, at the center line of pipe being bent.
When a pipe is bent, it could cause creases, reduced wall thickness, or increased resistance in refrigerant flow. It is recommended to make
the pipe bending radius R to be 3 times of pipe O.D., or more, at the center line of pipe being bent.
Center line
R
Fig. 17
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AB408540130380en-000102
4. Installation
Dimension
Pipe connection
via socket
Pipe prepared at site
*Pipe wall thickness shows that of C1220T 1/2H.
Pipe O.D.(mm)
Ø12.7
Ø15.88
Ø19.05
Ø 25.4
* In case of pipe material: C1220T 1/2H.
Type
OP-UPAC015COP04E
With bend
1.0, or more
1.2, or more
1.4, or more
1.8, or more
Connecting pipe dia. (Example) (mm)
Suction pipe Liquid pipe
Ø19.05 (Brazing) Ø12.7 (Brazing)
Downward slope
Wall thickness (mm)
Without bend
0.8, or more
1.0, or more
1.2, or more
1.8, or more
© Danfoss | Climate Solutions | 2023.02
Downward slope
Eliminate trap.